To each their own. The armor doesn't look bad per se, it's just not the type of armor that I'd ever picture Geralt wearing.That's an issue with a lot of the armor designs, they aren't necessarily lore friendly. I can see what you're talking about now, have you tried fast traveling or reloading a save to see if that fixes it?
It's the first armor I personally picture Geralt wearing, when his hair is styled into a low half ponytail along with a clean shave he looks elegant as hell and so does the armor, furthermore, the white collar fits Geralt's hair perfectly. Of course it mostly comes down to one's personal preference, the armor comes closest to my style in real life (always dress in black combined with a bit of white sometimes)
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(It's the mirror that's a bit dirty, not my clothes, not a good photo in either case (lightning's bad, etc.), just so happened I took a few minutes ago)
As of fixing the graphic bug, I've loaded several save games already, nothing changes, the armor's textures are just very low sometimes, then they switch back to normal... I will try fast traveling to a different map, see if it changes anything